Search for eta-mesic nuclei in photo-mesonic processes
G. A. Sokol, T. A. Aibergenov, A. V. Kravtsov, Yu. I. Krutov, A. I. L'vov, L. N. Pavlyuchenko, S. S. Sidorin
Abstract
Preliminary results of an experiment performed at the Lebedev Physical Institute with the bremsstrahlung photon beams of the end-point energies 650 and 850 MeV are presented. Correlated pi+n pairs with the opening angle theta = 180 deg and the energies Eπ= 300 MeV, En = 100 MeV from the process gamma + 12C -> N + eta(A-1) -> N + pi+ n + (A-2) were observed. They provide an evidence for an existence of the eta-11B and eta-11C eta-mesic nuclei.
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